Oxidation reactivity and kinetic analysis of bituminous coal char from high-temperature pyrolysis: Effect of heating rate and pyrolysis temperature
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Oxidation reactivity and kinetic analysis of bituminous coal char from high-temperature pyrolysis: Effect of heating rate and pyrolysis temperature
- 发表刊物：
- Thermochimica Acta
- 摘要：
- Non-isothermal thermogravimetry (TGA) is conducted at four heating rates to determine the kinetic parameters and oxidation reactivity. The ignition ( T i ), peak ( T p ) and burnout ( T e ) temperature and reactivity index S are calculated. Isoconversional method is adopted to determine the activation energy ( E α ) and frequency factor ( A α ). The rate constant ( k(T) ) is obtained by the kinetic parameters. The results show that S is strongly dependent on the TGA heating rate, while T i , T p and T e are independent of the heating rate. With the increase of pyrolysis temperature, T i monotonically increases, while the reactivity evaluated at T p , T e and k(T) ranks as char-1000< char-1200< char-800< char-600. A significant variation in T i , T p , T e and k(T) is observed between char-800 and char-1000. The compensation effect between thermal annealing and surface structure evolution determines the reactivity with the pyrolysis temperature. The mass loss at a higher heating rate is predicted based on E α and A α .
- 合写作者：
- Xing Liu, Houzhang Tan, Xuebin Wang, Zhao Wang, Xiaohe Xiong
- 是否译文：
- 否
- 发表时间：
- 2020-06-15